joslyn



` `To all when?, Zt concern:

. f oEEicE.

BENJAMIN JOSLTN, or WORCESTER, MASSACHUSETTS.

EoUBLE-ACTING PUMP.

`Be it known that I, `BENJAMIN F. JosLYN,

` of thecity and `county of Worcester and `State of Massachusetts,have invented anew y `and useful Improvement in Pumpsyand I do herebydeclare that theollowing is a full, clear, and exact description ofthe construction and operation of the same, referencebeing had to the drawings herewith resented makinga partof this specifica tion. i. i

Mypimprovement consists in` `making a f passage or waterway through the piston and i the "end of the cylinder `bywattaching a tube,

A,`(see drawing) tothe pistonL, extending `through a stuffing box infthe endof the cyl-` index' and allowing it'togplay A,with the pis-; t0n, the tube being provided with a valve` on the piston "toprevent thereturn of the water; the other parts i may be of any `of the usualforms of double` acting pumps f `in common use.` g y i The operation ofmy pump is on `moving the piston toward D the part C will be filled through a valve intheend .ofthecylinder` as F in theusual way (water being supplied i other parts.

\ `speciacaaon@framers Patent 12,631, dated April e, 1855.

at 13,) and when the piston is moved toward C `the part D will be filled by the water passing through the tube A and valve `H as indicated by the arrows while the water in part C is dischargedthrough valve E to the air chamber M and on the return stroke the water ini D is Similarly discharged through GQ I do not claim placing cylinders in any particular position in regard to the air stantially the Same. i

BENJ. F. JOSLYN. Witnesses:

MOSES CLEMENTS, JAS. Gr. ARNOLD. 

